Wells – Screens – Spiral
Reexamination Certificate
2011-06-07
2011-06-07
Stephenson, Daniel P (Department: 3676)
Wells
Screens
Spiral
C166S227000, C166S235000, C166S234000, C166S233000, C166S236000
Reexamination Certificate
active
07954546
ABSTRACT:
A screen section is made with variable resistance to flow in the screen material to balance the flow along the screen length. In one variation different discrete zones have screens configured for different percentages of open area while all have the same particle filtration capability. In another variation discrete portions have differing amounts of overlapping screen portions so as to balance flow without affecting the particle size screened. The cross-sectional shape of a wire wrap underlayment for the screen is made closer to trapezoidal to decrease the angle of opening for the incoming flow paths toward the base pipe. In this manner flow resistance is reduced and flow is increased due to reduced turbulence.
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Johnson Michael H.
Kim Namhyo
Richard Bennett M.
Rosenblatt Steve
Xu Yang
Baker Hughes Incorporated
Ro Yong-Suk
Rosenblatt Steve
Stephenson Daniel P
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